src/modules/m_override.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "m_override.h"
  16
  17 /* $ModDesc: Provides support for unreal-style oper-override */
  18
  19 typedef std::map<std::string,std::string> override_t;
  20
  21 class ModuleOverride : public Module
  22 {
  23         override_t overrides;
  24         bool RequireKey;
  25         bool NoisyOverride;
  26         bool OverriddenMode;
  27         bool OverOther;
  28         int OverOps, OverDeops, OverVoices, OverDevoices, OverHalfops, OverDehalfops;
  29
  30  public:
  31
  32         ModuleOverride(InspIRCd* Me)
  33                 : Module(Me)
  34         {
  35                 // read our config options (main config file)
  36                 OnRehash(NULL);
  37                 ServerInstance->SNO->EnableSnomask('G', "GODMODE");
  38                 if (!ServerInstance->Modules->PublishFeature("Override", this))
  39                 {
  40                         throw ModuleException("m_override: Unable to publish feature 'Override'");
  41                 }
  42                 OverriddenMode = OverOther = false;
  43                 OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
  44                 Implementation eventlist[] = { I_OnRehash, I_OnAccessCheck, I_On005Numeric, I_OnUserPreJoin, I_OnUserPreKick, I_OnPostCommand, I_OnLocalTopicChange, I_OnRequest };
  45                 ServerInstance->Modules->Attach(eventlist, this, 8);
  46         }
  47
  48         virtual void OnRehash(User* user)
  49         {
  50                 // on a rehash we delete our classes for good measure and create them again.
  51                 ConfigReader Conf(ServerInstance);
  52
  53                 // re-read our config options on a rehash
  54                 NoisyOverride = Conf.ReadFlag("override", "noisy", 0);
  55                 RequireKey = Conf.ReadFlag("override", "requirekey", 0);
  56
  57                 overrides.clear();
  58
  59                 for (int j =0; j < Conf.Enumerate("type"); j++)
  60                 {
  61                         std::string typen = Conf.ReadValue("type","name",j);
  62                         std::string tokenlist = Conf.ReadValue("type","override",j);
  63                         overrides[typen] = tokenlist;
  64                 }
  65         }
  66
  67
  68         virtual void OnPostCommand(const std::string &command, const std::vector<std::string> &parameters, User *user, CmdResult result, const std::string &original_line)
  69         {
  70                 if (OverriddenMode)
  71                 {
  72                         if ((irc::string(command.c_str()) == "MODE") && (result == CMD_SUCCESS) && !ServerInstance->Modes->GetLastParse().empty())
  73                         {
  74                                 std::string msg = std::string(user->nick)+" overriding modes: "+ServerInstance->Modes->GetLastParse()+" [Detail: ";
  75                                 if (OverOps)
  76                                         msg += ConvToStr(OverOps)+" op"+(OverOps != 1 ? "s" : "")+", ";
  77                                 if (OverDeops)
  78                                         msg += ConvToStr(OverDeops)+" deop"+(OverDeops != 1 ? "s" : "")+", ";
  79                                 if (OverVoices)
  80                                         msg += ConvToStr(OverVoices)+" voice"+(OverVoices != 1 ? "s" : "")+", ";
  81                                 if (OverDevoices)
  82                                         msg += ConvToStr(OverDevoices)+" devoice"+(OverDevoices != 1 ? "s" : "")+", ";
  83                                 if (OverHalfops)
  84                                         msg += ConvToStr(OverHalfops)+" halfop"+(OverHalfops != 1 ? "s" : "")+", ";
  85                                 if (OverDehalfops)
  86                                         msg += ConvToStr(OverDehalfops)+" dehalfop"+(OverDehalfops != 1 ? "s" : "")+", ";
  87                                 if (OverOther)
  88                                         msg += "others, ";
  89                                 msg.replace(msg.length()-2, 2, 1, ']');
  90                                 ServerInstance->SNO->WriteGlobalSno('G',msg);
  91                         }
  92
  93                         OverriddenMode = OverOther = false;
  94                         OverOps = OverDeops = OverVoices = OverDevoices = OverHalfops = OverDehalfops = 0;
  95                 }
  96         }
  97
  98         virtual void On005Numeric(std::string &output)
  99         {
 100                 output.append(" OVERRIDE");
 101         }
 102
 103         virtual bool CanOverride(User* source, const char* token)
 104         {
 105                 // checks to see if the oper's type has <type:override>
 106                 override_t::iterator j = overrides.find(source->oper);
 107
 108                 if (j != overrides.end())
 109                 {
 110                         // its defined or * is set, return its value as a boolean for if the token is set
 111                         return ((j->second.find(token, 0) != std::string::npos) || (j->second.find("*", 0) != std::string::npos));
 112                 }
 113
 114                 // its not defined at all, count as false
 115                 return false;
 116         }
 117
 118
 119         virtual int OnLocalTopicChange(User *source, Channel *channel, const std::string &topic)
 120         {
 121                 if (IS_OPER(source) && CanOverride(source, "TOPIC"))
 122                 {
 123                         if (!channel->HasUser(source) || (channel->IsModeSet('t') && channel->GetStatus(source) < STATUS_HOP))
 124                         {
 125                                 ServerInstance->SNO->WriteGlobalSno('G',std::string(source->nick)+" used oper override to change a topic on "+std::string(channel->name));
 126                         }
 127
 128                         // Explicit allow
 129                         return -1;
 130                 }
 131
 132                 return 0;
 133         }
 134
 135         virtual int OnUserPreKick(User* source, User* user, Channel* chan, const std::string &reason)
 136         {
 137                 if (IS_OPER(source) && CanOverride(source,"KICK"))
 138                 {
 139                         // If the kicker's status is less than the target's,                    or      the kicker's status is less than or equal to voice
 140                         if ((chan->GetStatus(source) < chan->GetStatus(user))                   || (chan->GetStatus(source) <= STATUS_VOICE))
 141                         {
 142                                 ServerInstance->SNO->WriteGlobalSno('G',std::string(source->nick)+" used oper override to kick "+std::string(user->nick)+" on "+std::string(chan->name)+" ("+reason+")");
 143                         }
 144                         /* Returning -1 explicitly allows the kick */
 145                         return -1;
 146                 }
 147                 return 0;
 148         }
 149
 150         virtual int OnAccessCheck(User* source,User* dest,Channel* channel,int access_type)
 151         {
 152                 if (!IS_OPER(source))
 153                         return ACR_DEFAULT;
 154                 if (!source || !channel)
 155                         return ACR_DEFAULT;
 156
 157                 int mode = STATUS_NORMAL;
 158                 if (channel->HasUser(source))
 159                         mode = channel->GetStatus(source);
 160                 bool over_this = false;
 161
 162                 switch (access_type)
 163                 {
 164                         case AC_DEOP:
 165                                 if (mode < STATUS_OP && CanOverride(source,"MODEDEOP"))
 166                                 {
 167                                         over_this = true;
 168                                         OverDeops++;
 169                                 }
 170                         break;
 171                         case AC_OP:
 172                                 if (mode < STATUS_OP && CanOverride(source,"MODEOP"))
 173                                 {
 174                                         over_this = true;
 175                                         OverOps++;
 176                                 }
 177                         break;
 178                         case AC_VOICE:
 179                                 if (mode < STATUS_HOP && CanOverride(source,"MODEVOICE"))
 180                                 {
 181                                         over_this = true;
 182                                         OverVoices++;
 183                                 }
 184                         break;
 185                         case AC_DEVOICE:
 186                                 if (mode < STATUS_HOP && CanOverride(source,"MODEDEVOICE"))
 187                                 {
 188                                         over_this = true;
 189                                         OverDevoices++;
 190                                 }
 191                         break;
 192                         case AC_HALFOP:
 193                                 if (mode < STATUS_OP && CanOverride(source,"MODEHALFOP"))
 194                                 {
 195                                         over_this = true;
 196                                         OverHalfops++;
 197                                 }
 198                         break;
 199                         case AC_DEHALFOP:
 200                                 if (mode < STATUS_OP && CanOverride(source,"MODEDEHALFOP"))
 201                                 {
 202                                         over_this = true;
 203                                         OverDehalfops++;
 204                                 }
 205                         break;
 206                         case AC_GENERAL_MODE:
 207                         {
 208                                 std::string modes = ServerInstance->Modes->GetLastParse();
 209                                 bool ohv_only = (modes.find_first_not_of("+-ohv") == std::string::npos);
 210
 211                                 if (mode < STATUS_HOP && (ohv_only || CanOverride(source,"OTHERMODE")))
 212                                 {
 213                                         over_this = true;
 214                                         if (!ohv_only)
 215                                                 OverOther = true;
 216                                 }
 217                         }
 218                         break;
 219                 }
 220
 221                 if (over_this)
 222                 {
 223                         OverriddenMode = true;
 224                         return ACR_ALLOW;
 225                 }
 226                 else
 227                 {
 228                         return ACR_DEFAULT;
 229                 }
 230         }
 231
 232         virtual int OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
 233         {
 234                 if (IS_LOCAL(user) && IS_OPER(user))
 235                 {
 236                         if (chan)
 237                         {
 238                                 if ((chan->modes[CM_INVITEONLY]) && (CanOverride(user,"INVITE")))
 239                                 {
 240                                         irc::string x(chan->name.c_str());
 241                                         if (!user->IsInvited(x))
 242                                         {
 243                                                 if (RequireKey && keygiven != "override")
 244                                                 {
 245                                                         // Can't join normally -- must use a special key to bypass restrictions
 246                                                         user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 247                                                         return 0;
 248                                                 }
 249
 250                                                 if (NoisyOverride)
 251                                                         chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass invite-only", cname, user->nick.c_str());
 252                                                 ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +i on "+std::string(cname));
 253                                         }
 254                                         return -1;
 255                                 }
 256
 257                                 if ((chan->modes[CM_KEY]) && (CanOverride(user,"KEY")) && keygiven != chan->GetModeParameter('k'))
 258                                 {
 259                                         if (RequireKey && keygiven != "override")
 260                                         {
 261                                                 // Can't join normally -- must use a special key to bypass restrictions
 262                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 263                                                 return 0;
 264                                         }
 265
 266                                         if (NoisyOverride)
 267                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel key", cname, user->nick.c_str());
 268                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +k on "+std::string(cname));
 269                                         return -1;
 270                                 }
 271
 272                                 if ((chan->modes[CM_LIMIT]) && (chan->GetUserCounter() >= atoi(chan->GetModeParameter('l').c_str())) && (CanOverride(user,"LIMIT")))
 273                                 {
 274                                         if (RequireKey && keygiven != "override")
 275                                         {
 276                                                 // Can't join normally -- must use a special key to bypass restrictions
 277                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 278                                                 return 0;
 279                                         }
 280
 281                                         if (NoisyOverride)
 282                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass the channel limit", cname, user->nick.c_str());
 283                                         ServerInstance->SNO->WriteGlobalSno('G', user->nick+" used oper override to bypass +l on "+std::string(cname));
 284                                         return -1;
 285                                 }
 286
 287                                 if (chan->IsBanned(user) && CanOverride(user,"BANWALK"))
 288                                 {
 289                                         if (RequireKey && keygiven != "override")
 290                                         {
 291                                                 // Can't join normally -- must use a special key to bypass restrictions
 292                                                 user->WriteServ("NOTICE %s :*** You may not join normally. You must join with a key of 'override' to oper override.", user->nick.c_str());
 293                                                 return 0;
 294                                         }
 295
 296                                         if (NoisyOverride)
 297                                                 chan->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s used oper override to bypass channel ban", cname, user->nick.c_str());
 298                                         ServerInstance->SNO->WriteGlobalSno('G',"%s used oper override to bypass channel ban on %s", user->nick.c_str(), cname);
 299                                         return -1;
 300                                 }
 301                         }
 302                 }
 303                 return 0;
 304         }
 305
 306         virtual const char* OnRequest(Request* request)
 307         {
 308                 if(strcmp(OVRREQID, request->GetId()) == 0)
 309                 {
 310                         OVRrequest* req = static_cast<OVRrequest*>(request);
 311                         return this->CanOverride(req->requser,req->reqtoken.c_str()) ? "yes":"";
 312                 }
 313                 return NULL;
 314         }
 315
 316         virtual ~ModuleOverride()
 317         {
 318                 ServerInstance->Modules->UnpublishFeature("Override");
 319                 ServerInstance->SNO->DisableSnomask('G');
 320         }
 321
 322         virtual Version GetVersion()
 323         {
 324                 return Version("$Id$",VF_VENDOR,API_VERSION);
 325         }
 326 };
 327
 328 MODULE_INIT(ModuleOverride)